`DEVASTATING`

Herb SchwartzCHICAGO TRIBUNE

The results of the polls taken since Lt. Col. North`s testimony are more devastating to President Reagan than widely reported.

He won re-election in 1984 with 59 percent of the vote, and now only 30 percent of those answering the questions say that he is not lying or can be trusted ''to make the right decisions on foreign policy.'' This means almost one-half of those who voted for him have turned against him.